MOUNT RORAIMA IN BRITISH GUIANA. 37 



emarginate, membranous appendage at the base, glabrous ; pollen apparently red. 

 Ovary 5-celled, surmounted by a rather deep ring-like disk ; style much exserted, 1^ in. 

 long', rather slender, pubescent ; stigma slightly thickened, ovoid-conical, tipped -with 5 

 minute points. Ovules 2 in each cell, collateral, axile, pendulous from near the top of 

 the cell, and partly covered at the top by a cap-like outgrowth of the funiclc-like 

 placenta. Fruit a globose, ribbed berry about \ in. diam., crowned with the calyx-tube ; 

 eudocarp hardened into 5 separable nutlets, 3-keeled on the back, triangular in 

 transverse section, with a false cell under each lateral wing. Seeds not seen. 



Aroie Creek, im Thurn, 6. Upper slopes of Mount Roraima, McConnell & Quelch, IS; 

 Appun, 1175 ; Schomburgk, 724 (815 b), 158. 



This very distinct species of Retiniphyllum appears to have been misunderstood by all 

 authors. Originally it was doubtfully referred by Bentham to the genus Patima, and 

 erroneously described as having very numerous seeds. Next, in Bentham and Hooker's 

 ' Genera Plantarum,' ii. p. 98, it is confused with Kutchubcea insignis, Fisch., and the 

 part of the generic description in that work, relating to the fruit, is drawn up from the 

 present plant and not from the true Kutchubcea, which indeed it greatly resembles in 

 habit, but differs in having a 5-lobed corolla, 5 exserted, reflexed stamens, with long 

 filaments, a long exserted style, and in the presence of a minute disk-like involucel at 

 the apex of the pedicel, which is jointed to the calyx ; whilst in Kutchubcea the corolla is 

 8-lobed, the stamens are 8, with the anthers almost sessile and included in the throat of 

 the corolla-tube, the style is included, and the pedicel is continuous with the calyx, 

 without any trace of an involucel ; the foliage and stipules of the two plants are also 

 very different, besides disagreeing in several minor details. Finally Baillon made a 

 distinct genus of it, which he jnaced next to Knoxia, where it has no affinity, for it is 

 undoubtedly a true Retiniphyllum, allied to H. scabrum, Benth., but differing from that 

 and all others of the genus by the long slender pedicels of its lax, few-flowered 

 inflorescence. The involucel is characteristic of the genus Retiniphyllum. 



Psychotkia concinna, OHver, in Trans. Linn. Soc. Ser. II. ii. (1887) p. 276, t. 12. f. B. 

 Summit of Mount Roraima, McConnell 8f Quelch, 80, S9, 667. — Endemic. 



Psychotria crassa, Benth. in Hook. Journ. Bot. iii. (1811), p. 227 ; im Thurn & Oliver, 

 in Trans. Linn. Soc. Ser. II. Bot. ii. (1887). pp. 265, 276 ; R, Schomb. Reisen in 

 Brit. -Guiana, iii. p. 945. 

 Summit of Mount Roraima, 3fcCounell & Quelch, 632. Also collected on Roraima by 



Appun, 1112. — Kanuku Mountains. 



Diodia hyssopifolia, Cham. & Scblecht. in Linnsea. iii. (1828), p. 350. 

 Kotinga Valley, McConnell & Quelch, 190. 



